Self-lubricating spring-bolt.



UNITED STATES ATENT OFFICE- os'emz mim, on emvennno; exim, Allegiance., er Miserie ASSIGNMENTS, .To GEORGE www; or AUBURN, .New roma.

SELF-'LUBRICATING SPRINGBOLT. Y

.Patented Feb. 5, 1918.

Appunti@ med neeember'si, 1am. semi No. 739,581.

i "oo awem. L I

:il L @SGAR Znnx, :i subor of .Mlshr'ie, residing :it Cleveland, 1141-1 ee'o'ulity of Cuyzilioga-end Stzite of Ohio, .liwefin'vented o eerltxrin new :mil useful Imprih'en'ient in Selll'lnbrionling Springolts, of which lille following is; ai full, clear, and emot4 dfaerfziixpllion refrrmee being' had' to the accompanying drewan This invention relates fo bolts for con neting the leaves or sl of gnonobie springs,' and its object to provide 'ai anni ple und attractive Joie for this@ purpf-,sr Wliioli shall contain e reservoir for lnbri cant and be provided with oleane whereby vs'i'ioli 'lu'brijcantr'i's fedV o the Wearing smrfoeevgns; n eedel,y and distributed thereon., The "oll'lsys'stem of 'attaching a grease cup to lylie "enk' @spring boli'lms been unsetis- Y finge the operator Wes very lio lfierce {zoomulch grease ini@ the :i ity, for, would forget to feed the gre efwlierl required, and the boltnwoiild .ber r"nrfghermore7 the projectingo. dry., .i nps :we unsigizly in appearance and. y`'z'ul'gl' Loftbe ozqieriee of the bolt.

I'ntbe@resent-invention l. provide e boli?A having l:i b'ore. inv one end, which, r4in. ilse, is eloiiecl'by e oep so the heed. of which ,mlces rho plooe' :.--i' The usuel nnr. A rerliel. li'ol'eljeadsfrorn thisV bore to the Wem-ing eur faeeoffbje 'bolt'end :i felt wick ooclipying Lliie 'lor/fend" Spring pressed outwardly,

' tho'flnbricenf gradually and, continu- :is needed. Means :wel proyied to `pu en ljQthe bolt tiirni'ng 'and maintain the radialh le extending n pwardl so'thet the l suitable leek is also d; "forth d; p .sorew or fn'd .others 'w i I ie' :L vertical zrkifil ny Spring:r boil/'in 'piace w, spring); lwtwrrn two Hlieekie l i loi' which iro shown; ferfiviil .Slion'of tbe' ogni! livr willi "ilfC lorie;

the sbonk l5.

-A hold tightly on fhe'she'nk.

bolo sind extending'. l y *l v y porous plug :Il preferably of felt. This ping "l' lie-'boli'. in'pinee inv 1' ille bolt; inni, al; ourl .or more pointsv fl-long" sin @wording to the construction, or l mul-:le pluies muy be, ears on another spring member, as well understood.. 8 1ndientes ille boltV which occupies elined open-- ings in 112e two shackle members and the iniermeiliue sleeve 3. One head of the bolt 9 is "i :mil inlegfrsil iliorewitli, while the other7 of e Gzip screw screwing into tlie boli boring 2in overlionginghead Whioli mires the place of The nsuelfnut. Suchconstruction pivotally connects the spring leaf l with the shackle members, es will be understood. 'K

The bolt 8 is of e comparatively largedi iiineter, to provide 'olnrgebeering sul-farce,v and has inzernully aborelQ extending from one end well tovmrdthe solid heed 9` This bore is normally cios-edel tl'ie other end by I tbe threaded shank 15' of he een screw I0. To make a, li litl joint I mount on the inner onli. of this screw shank :i leather' or other eliieie washer 16 which has e threaded periphery but sli btl y lorgeirtlmn the shank 3.5. Si) that it malins o very tight connection with the bore, the boro. bring' threederlin ernelly from its free end To mcoi'njrrodite' the boli'. sbonk and Washer.' rllie-wfisher is carried on si tloned stud l8- extenrlng'froin The flatten y sind prevents tbe wifzisli'er fili-ning. 'A thm meful washer li) Surrounds tlio stud :ind lies against the wzislxernnil ihernd portionyof'i the stud peenedover lifterrhownshers'fire in place, :is shown at 20, Vund thus Lheleelle Extend ing' through ille' wia-'ll of' the lool innlre u' shallow peripheral groovelQ about:

the parts are assern led', but, i-n use, are-bent the bolt, I make communicating longitudinal shallow grooves 26. Thengitudinal grooves are no longer than the eye 3 Yand serve to distribute the. oil to the sleeve 3 Without carrying it to unnecessary portions of'the structure.

To keep the oil hole 2B at the top, so that...

minating preferably Hush on its oilter .face

with the face of the head. f

The leather washer 16 makesjsuch a tight connection with the internal I.thread of the bolt that it. acts as a lock. to hold the ca screw, acting as a nut, in place. It desire however, I may provide a special nut -lock for: this cap screw, and a lock for this purpose is shown in the drawing and designated 30. .It consists of. a AWasher surrounding the bolt and clamped between the head of the cap screw and theshackle plate 5, the washer having one or more projections 32 formed toenter depressions in 'the side tace of the shackle plate. and being provided'w'ith ears 33 which lie in the lane of the washerwhen over onto flat sides of the nut head to'hold it against rotation. V'Ihisqmakes a simple and secure lock. l f

Inasmuch as 'the lubricant is only taken from the reservoir in the bolt as needed, it

will last for avery long time. In fact lthe bolt may carry a yearssuppl'y of oil at'f'one filling.V VThe expense of operation isgfthreforenegligible. The bolt is verystrong. Its .i

. bearing surfaces are large, and the oil isfdistributed to thepoints where needed and the.

,. rotation is confined tothe points which are lubricated. On account of y the ,zottiiiuous lubrication' and the largebeari'ng surface,

the-bolt will out-wear the car towhichit is applied. It should be noted also that/,by

reason of the internal nut and the absence..

of threads onthe outside'of the bolt, the shackle has a full bearing surface. The

- neatness (ifappearance is also a feature of this bolt. In fact, notwithstanding its selflubricating character, it is far neater in appear-ance' than a solid bolt, y

Having thus described my invention, what` I claim is: .f

1. Thecombin" tion of a hollow bollt hav ing anoil 4cavity in the interior thereof, Aan opening leading fpom said cav-,ity through the periphery of the bolt, the openin Vbeing of less size than'. the cavity where y the cavity constitutes lan oil reservoir, a capillary plugin-1 the opening and extending into theV cavity and being of Vlesssize than 4the f ried by the cap screw' within the bolt ih posia capillary plug located in the opening and extendingsubstantially radially lntdth'e oil it cavity and located remote from an end of the oil cavity, and a spring pressing latene end against the plug and at its; other end onV 1 the Wallof the 011 cavity diametricallyopposite the outlet openin substantially and 8o for the purpose vspeci ed.

3.4 The combination of a hollow bolt oomprising a hollow body closed at one'end, a

cap screw threading into the otherfend of the body, and an elastic Washer carried by the cap screw withinthe bolt and engaging' the internal threads within the bore of the bolt, 1s ulstantially as and for-the purpose speci- 4. A self-lubricating s r'ing bolt comprising a hollow.tubular bo y tl one end, a cap screw threading intof the dtherend ofthe body 'and including! a threaded shank, an 'overhanging head and reduced shank projecting vfrom-the"threaded .shank-.and an` elastic washer mounted on the' reduced shank, substantially as and for the purpose set forth.V -1 l 5i The combination of a tubular bolt havying ahhead' rigid therewith, a removable head lhaving a screw threaded engagement with the/bolt,r anppening through the peripheral wall of the'bolt, a porous plug occupying such opening, andarranged .substantially Iradially .with the axis of the bolt anda los yspr-ing"pressing .said plug outwardly the )'springgfbeing. arranged lin Vthe bolt and radiali relatively tothe axis thereof, subs'ta'iitia ly'as vand for the purpose. described.

f 6. In a self-lubricatin spring. bolt, the llt .combination of a hollow olt,A the cavity of which opens through one end'thereof, thev hollow bolt also havin an opening through the periphery thereo a porous'. plug arranged in the opening, aspri `pressing-the plug outwardlyL and arrange inline with said' openin .and radially rclativel to the axis of the olt, and a plug secure in and Vclosing the open end of'thexhollow bolt 'and having a head serving as la head for the bolt, Vulstantially as and-afer the purposespeci- 7. In a device of the character described', the combination of a bolt having a tubular body with a solid head on one end/and an internal ,thread adjacent to the. other. end, a cap screw' screwing into such threaded porg tion and having an overhanging head adapted to act as a nut, and :inelastic washer car tiol'n to engage the wall of the bore' of the t.

. into such threaded end and `8 In'a, spring bolt, the combination of'a .tubular body and a head made integral therewith, the body being internally threaded near its free end, 'a cap screw screwing jecting head, an elastic packing carrie Aon the inner end of the cap screw andadapted to tightly engage the thread, and a. gassage.

' and having a projecting head, an elastic packing earried on the inner end of the cap .screw and adapted to tightly engage the thread', a passage for lubricant from the interior of the bolt to the exterior, and a wick occupying said passage and adapted to 'carry having a.' ro-v lubricant for capillary action from the interior to the' exterior of the bolt. l

10. "The combination of a bolt having at one end a solid head and provided with an .internal bore extendin from its solid head te the other end, the `.ore being internally screw screwing into such threaded end' and having `a projeotin head, an oil .opening from the interiore the bolt to itsv exterior, a Wick in said opening, about the exterior oj'fthebolt at theexit of such opening, and aflongitudinal grooveon coinmunlcation. with the surface ofgthe 'hx'lt the peripheral groove.

In testimony whereof, I hereunto Vailier my' signature in the presence of two-witnesses..

oscila- Zaan "Witnesses:4

ALBERT H. BATES, v BRENNAN B. WEST.

a peripheral groove' Vthreaded adjacent to such other' end, a cap 'l 

